What did Zuckerberg and crew do to celebrate? Well, they had every single employee of Facebook take a picture of themselves "thanking" the users that have gotten them this far. You can check out that album by clicking here.

Zuckerberg began Facebook as a student at Harvard University. He wanted to put the social experience of college on Facebook by creating a living yearbook. Facebook eventually opened up to other Boston area colleges within a few months of its launch. Later on, it allowed all college students to sign up with a valid college e-mail. Within 2 years, Facebook allowed anyone to join with a valid e-mail account.

“These services [on Facebook] are really universal, everyone has family and friends across the world that they want to stay connected with,” Zuckerberg told Diane Sawyer in an ABC World News interview that aired yesterday.

The social network will also be making an appearance on the big screen in October, showcasing the creation of the medium along with the controversies that have splattered onto headlines about it over the past years. Zuckerberg and other employees have said that the movie is “much more exciting” than the actual launch of the company, and claim that much of it is fiction.

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